Carburetor



June 15 1926. 1,588,667

N. ECKLES CARBURETOR Filed April 22, 1920 1N VEN TOR. NOBLE fc/(LES.

A TTORNEY Patented une 15, 1926.

' UNITED STATES 1,588,667 PATENT oFFicE.

NOBLE AEGKIIES, F ISAN DIEGO, CALIFORNIA, ASSIGNOR OF THREE-FOURTHS TOLEWIS W. RHODE, SAN DIEGO, CALIFORNIA.

CARBURETOR.

Application led April 22, 1920. Serial No. 375,691.

My invention relates to carburetors for preparing fuel for internalcombustion engines and the objects of my invention are:

first, to provide a carburetor which is so constructed that the fuel inproper regulated quantities may be drawn from a tank on a lowerelevation by' the vacuum created by the operation of the pistons in thecylinder of the engine thus dispensing with the conventional vacuum orpressure-systeml of fuel supply as used in the conventional automobile,or the like; second, to provide a carburetor in which a continuouspartial vacuum of .varying degree is maintained in the fuel bowl atsubstantially all motor speeds and under substantially. all conditionsthus causing the fuel supply bowl to be replenished at substantially alltimes by the partial vacu'um in said fuel supply bowl; third, to providela carburetor of this class in which the operation of the carburetor andregulation of the proportionate quantities of fuel and air are entirelycontrolled by the relative degree of lpartial vacuum between the fuelsupply bowl and the air supply passage which relative vacuum regulationis operated automatically with the operation of the throttle; fourth,to' .provide a carburetor of this class which'is adjustable throughout;fifth, to provide separate means for regulating the vacuum in thecarburetor for use at low speed and idling; and sixth, to provideacarburetor of this class which is very simple', economical ofconstruction, durable, vflexible', eiiicient in its action, easy. torepair and install and which will not readily deteriorate or get outoforder.

With these and other objects in view asV will appear hereinafter myinvention consists of certain novel features'of construction,combinatlon and arrangement of parts and portions as will be hereinafterdescribed in detail and particularly set forthin the appended-claimsreference being had to the accompanyin drawings and tothe charactersy ofre `erencer thereon whichformv va part of this application in which:

' Figure 1 is aflohgitudinal sectional view of my carburetor '-throu hthe middle thereof Fig. 2 is a'. sectiona view through 2--2 of Fig; 1;Fig. Sis a sectional viewthrough op 3-3 of Fig. 1; Fig; 4 is' 'a top yor-plan view of a fragmentary' portion of carburetor 7, throttle valve 8,`drain conductor 9, 10Wv l speed fuel feed 10, relative vacuumregulating-valve 11,and fuel conductor 12 constitute the principal partsand portions of my carburetor. j The main Vcasing 1 is substantially aconducting tube functioning as van air conductor. It is provided with adip portion forming a bowl 1a surrounding vthe fuel inlet nozzle 1c intosaid casing and provided with a downwardly extending web 1b therein forguiding and deiecting the air downwardly past thefuel inlet nozzle 1c.This casing portion 1 is provided with an inwardly projecting portion 1din the one side thereof which is provided with anarrow slot 1e thereinshown best in Fig. 3 and mounted over this projecting portion ldin saidcasing is an. intermediate regulating valve 7 which is supported in thewall of said'casing and providedwith anextended portion 7 extending outthrough 'the one side and mounted onl this extending portion ia is anarm `membery 7b for operatin said valve 7, which is for the purpose-ocontrolling or increasing the suction in the air passageway ,in theregion of the nozzle v1 and back-suctionconnection11'?. The cas'- ing 1is provided withan extended portion l`t which serves as an air inlet tovthe 'carburetor." Mounted on. the" lower side of this portion-1,t isaIspider member 1 which is portion 1l is a yvalve stem 4 thus forming a vsupport for the valve which functions to prevent its fluctuating orvibrating with the movement of the air into vthe'carburetor. f'

'1`1 e valve seating portion: ofthe valve 4 is provided with a thin edgewhich is'ad'apted ,j

tov move up and down over 'the slot 1 as the air passes intoy thecarburetorv and the valve is :actuated by the vacuum caused by thethrottle' of 'the' carburetor: 'This 'valve is also provided-with aspring engages the inwardly extended end of the adjustingl screw 6Whichprovides for adjusting the valve 4. .Mounted arou ydlthe cupportion la of the casin 1 isthe fuel bowl 2 sometimes termed the oatchamber. Supported in a downwardly extended portion "51 of the casing land mounted in this-down wardly extended portionis a needle valve Iwhich is adapted to regulate the Howof fuel from said bowl through theinlet nozzle 1".'VV

'tle'` valve and the intake manifold of the en- "ginexis a conductor 9awhich is provided Iwith a valve 9b therein and communicating therewithis the conductor9 which eX- tends to the bottom of the bowl la and isladapted to drain the bottom of this bowl of surplus fuel therein causedby condensation with the varyingopenings of the throttle and the needlevalve 9 regulates the opening in said conductor 9. Communicating withthis conductor 9a is another conductor l0 which extends downwardlyk andcommunicates withvthe lower side of the in terior of the fuel bowl 2 andis for the purpose of providing fuel to the engine from the carburetorbowl in small quantities for low speed. Mounted on the sidey of thecarburetor is a conductor 1la connectingthe interior of the fuel bowlwith the interior of the casing l and it is provided with a needlevalve1l for regulating the opening through said conductor. This valve and'conductoris for the purpose of regulating and tending towardequaliz'ing the vacuum in the casing and float chamber when run ning atlow speed. v

Though I "have shown and described a particular construction,combination and arrangement of parts and portions and a cer- .tainmethod of controlling the relative vacua between the carbureting chamberand the :constant level chamber I do not wish to be limited to thisparticular construction, com-A --bination and arrangement vhereindescribed ibut desire to include in the purview of my :invention theconstruction, combination and arrangement substantially as set forth infthe appended claims.

" It 1s obvious that with this-construction itherefisyprolvided la meansfor taking the fuel from; a; fuel: tank although considerably be low'the carburetor and conductingit di rectly to thel'car'buretor bowl andfor mixresaca? ing this fuel with air in proper regulated quantities andconducting it to the cylinder of the engine; that no eXtra vacuum sys--tem or mechanism is required; that the carburetor is so constructedthat the liow of fuel to' the bowl. is in proportion to the vacuum inthe bowl which is regulated in the proper ratio with the air passingthrough 'the carburetor; that the relative variation inthe vacuumexisting in the main air passage and in the float chamber varies the inthe relative vacuums between that maintained in the fuel supply bowl andthat maintained in the main air supply passage of the carburetor andthat as the throttle is opened the vacuum in the main casing is slightlyincreased thus opening the air valve and decreasing the vacuummaintained in the float chamber by means of the air valve exposing apart of the slot le to the atmospheric pressure w`1ich in turn allowsmore gasoline to pass through the spray nozzle 1c to be mixed with alarger volume of air passing through the main casing.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is: v

y1. In a carburetor, the combination of a carburetingchamber having anair inletand a mixture outlet,- an anterior air valve controllingsaidair inlet, a throttle valve controlling said mix-ture outlet, aconstant level fuel chamber, means` adapted to transmit suction fromsaid carbureting chamber to said constant level chamber, and a portmechanically controlled by the movement of said air valve and arrangedto be alternately connected thereby to the atmosphere or to the suctionof said'carbureting chamber for controlling the admission of air to saidconstant level chamber.

2. In a carburetor, the combination of a carbureting chamber having anair inlet and a mixture outlet, an air valve controlling said air inlet,a constant level fuel chamber,

a fuel inlet to said carbureting chamber fed from said constant levelchamber and a port communicating with said constant level chamber andcooperating with said air valve,

said port being arranged whereby the move? ment of said air valvedifferentially exposes varying areas of said port to the suctionposterior to said air valve and to the-atmosphere anterior to said airvalve. u

In a carburetor, thecombinatio'n of air passageway, an automatic airvalveeo'nitrolling the inlet to said air passagewa'yya throttlecontrolling the outlet, an iiitermeL diate valve between said airvalvef'nd's'aid throttle,l a fuel supply chamber,`a`.fuellinlt fed fromsaid fuel supply chamber an; "i

charging' into said air passageway, and a passageway communicating withsaid fuel `chamber above the fuel level therein and having portscommunicating with said air passageway between said automatic air valveand said intermediate valve, and between said intermediate valve andsaid throttle.

4. In a carburetor, the combination of an air passageway having-an inletand an outlet, an automatically operating air valve controlling saidinlet, a throttle controlling said outlet, an intermediatevalve,aconstantlevel fuel supply chamber, a fuel inlet fed from saidsupply chamber andwdischarging into.

said air passageway at a point between said intermediate valve and saidthrottle, a passageway yextending from said fuelv supply chamber andopening into said air passageway between said automatic air valve andsaid intermediate valve, and a passageway extendingy from said supplychamber and opening into said air passageway between said intermediatevalve and throttle.

5. In a carburetor, the combination of a carbureting chamber having anairinlet and a mixture outlet, an automatically operating air valvecontrolling said air inlet, a throttle controlling said outlet, amanually operatedvv intermediate valve in s'aid carbureting chamfuelinlet from said fuel supply chamber to said carbureting chamber,athrottle valve controlling the mixture outlet, an air valve forcontrolling the air inlet, a passageway from said fuel supply chamber tosaid carbureting chamber, an intermediate valve in said `carburetingchamber positioned to control the effect of the suction in saidcarbureting chamber on said passageway, saidair valve being adapted inits opening movement to move along the entrance of said passagewa to actas a valve forsaid passageway to di erentially proportion the suctioneffect in said passageway and airflow thereto when said intermediatevalve is open.

7. In a carburetor, the combination of a carbureting'chamber having anair inlet and a mixture outlet, a fuel supply chamber, a fuel inlet fromsaid supply chamber to said carbureting chamber, a throttle valve' con-rtrolling said mixture outlet, an automatic valve controlling the airinlet, a passageway extending from said carbureting chamber to said fuelsupply chamber above the level .of fuel therein, an intermediate valvein said carbure-ting chamber operable to control the effect of the,suction in said carbureting chamber on said passageway and saidautomatic valve, said intermediate valve when closed disconnecting saidpassageway and said automatic valve from the suction elfect in saidcarbureting chamber and when open exposing said passageway and saidautomatic valve to the suction ei'ect whereby said automatic valve willbe operated, said' automatic valve when in operation cooperating withsaid passageway to differentially expose said passageway to the suctioneect and to air flow. i

In testimony whereof, I have hereunto set my hand at San Diego,California, this 16th day 0f April, 1920.

i NOBLE ECKLES.

